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  2. Survey marker - Wikipedia

    en.wikipedia.org/wiki/Survey_marker

    Closeup of a United States Coast and Geodetic Survey marker. United States Army Corps of Engineers Survey Marker Marker for triangulation station, indicated by triangle in center Reference marker for triangulation station in upper photo A cotton spindle spike in Tel Aviv pavement, used as a marker for public area cadastral surveying.

  3. Pile cap - Wikipedia

    en.wikipedia.org/wiki/Pile_cap

    A pile cap is a thick concrete mat that rests on concrete or timber piles that have been driven into soft or unstable ground to provide a suitable stable foundation. It usually forms part of the deep foundation of a building, typically a multi-story building, structure or support base for heavy equipment, or of a bridge.

  4. Keystone (architecture) - Wikipedia

    en.wikipedia.org/wiki/Keystone_(architecture)

    In Christianity, Psalms 118:22, [6] translated in the Authorized Version as "The stone which the builders refused is become the head stone of the corner", is taken to refer to Jesus. Referring to the Book of Mormon , Joseph Smith said that it "was the most correct of any book on earth, and the keystone of our religion, and a man would get ...

  5. Triangulation station - Wikipedia

    en.wikipedia.org/wiki/Triangulation_station

    The pillars are 18 centimetres (7.1 in) on a side, and each pillar is anchored with two very large perpendicular rocks buried underground. [4] Class 2 (二等三角点, nitō sankakuten) They are installed approximately every 8 kilometres (5.0 mi). There are about 5000 throughout Japan, and the pillars are 15 centimetres (5.9 in) on a side.

  6. Boundary marker - Wikipedia

    en.wikipedia.org/wiki/Boundary_marker

    A boundary marker, border marker, boundary stone, or border stone is a robust physical marker that identifies the start of a land boundary or the change in a boundary, especially a change in direction of a boundary. [1] There are several other types of named border markers, known as boundary trees, [2] [3] pillars, monuments, obelisks, and ...

  7. Piling - Wikipedia

    en.wikipedia.org/wiki/Piling

    The typical construction process for a wind turbine subsea monopile foundation in sand includes driving a large hollow steel pile, of some 4 m in diameter with approximately 50mm thick walls, some 25 m deep into the seabed, through a 0.5 m layer of larger stone and gravel to minimize erosion around the pile.

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Pier (architecture) - Wikipedia

    en.wikipedia.org/wiki/Pier_(architecture)

    A concrete girder bridge pier during construction prior to installation of the bridge deck and parapets, consisting of multiple angled pylons for support (bottom), a horizontal concrete cap (center), and girders (top) with temporary wood bracing A quadruple compound pier supporting the fly-over at the traffic junction 24 Oktoberplein (Utrecht ...